Sanding and rubbing machine.



H. WBSTPHAL.

SANDING AND RUBBING MACHINE.

PPLIUATION FILED JULY 14; 1909.

Patented May 10, 1910.

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-LHHOGRAPNERSMASNINGTON D C H. WESTPHAL. SANDING AND RUBBING MAGHINE.

APPLICATION FILED JULY14,1909.

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UNIT 1 SATS PATENT IFIQE HENRY WESTPI-IAL, 0F MANITOWOG, WISCONSIN.

SANDING AND RUBBING MACHINE.

To all whom it may concern:

Be it known that I, HENRY VVESTPHAL, a citizen of the United States, anda resident of Manitowoc, in the county of Manitowoc and State ofWisconsin, have invented certain new and useful Improvements in Sandingand Rubbing Machines, of which the following is a specification.

This invention relates to wood working machines and relates particularlyto sanding and rubbing machines.

rlhe object of the invention is to provide an improved machine adaptedfor effectively sanding and rubbing surfaces, particularly woodsurfaces, whether flat or curved.

To this end a machine of my invention consists of the various features,combinations of features and details of construction hereinafterdescribed and claimed.

In the accompanying drawings, in which my invention is fullyillustrated,-Figure 1 is a top plan view of my improved machine. Fig. 2is a side view thereof; and Fig. 3 is an enlarged sectional elevationthereof on the line 3 3 of Fig. 2.

The operative parts of my improved machine are mounted on a suitableframework, consisting, as shown, of longitudinal frame members 1 and 2supported adjacent to their ends upon frame members A, A', eachconsisting of upright supports 3 and 41 connected adjacent to theirupper and lower ends by transverse frame members 5 and 6.

The work to be sanded or rubbed, as a table top or the like, indicatedat B, is adapted to be supported upon a suitable table, indicated as awhole by C, which is mounted so as to be freely movable transversely ofthe machine. Said table C may be of any suitable construction,consisting, as shown, of boards or slats 7 rigidly connected by cleats 8consisting, as shown, of angle bars, a flange of each of which eX- tendsat right angles to the under side of the table C. IVhile my inventioncontemplates mounting the table C in any desired or approved manner toprovide for necessary movement thereof transversely of the machine, Iprefer to support the same by means of antifriction or roller bearings',so as to permit movement of said table with the least possible effort.As shown, said roller bearings are formed by grooved wheels or rollers 9comprising two series mounted on rods or shafts 10 and 11, respectively,said rollers 9 running upon suitable tracks on the ma- Specication ofLetters Patent.

Application filed July 14, 1909.

Patented May 19, 1919.

serial No. 507,459.

chine frame formed, as shown, by the upturned flanges of angle bars 12and 13, the angle bars 12 being secured directly to strips or bars 14secured to the end frame members A, A and the angle bar 13 to a horse 15supported midway between said frame members A, A. The grooves in thewheels or rollers 9 engage the edges of the projecting flanges of theangle bars 8 projecting downwardly from the under side of the table Cand also the edges of the upwardly turned fianges of the angle bars 12and 13. The-tracks formed by the angle irons 9, 12 and 13 are made ofproper length to provide for desired transverse movement of the table C,the movement of said table being limited by suitable stops consisting,as shown, of the downwardly turned ends 16 of the angle bars 8 and theupwardly turned ends 17 of the angle bars 12 and 13.

The rubbing agencies comprise any desired number of blocks 18 supportedat the free ends of supporting arms 19 so as to be freely movable in alldirections, as by universal joints 20. The supporting arms 19 arepivotally connected to a head 21 mounted so as to reciprocate lengthwiseof the ma-v chine, in or upon suitable guides on the machine frame. Asshown, said guides consist of parallel rods 22 the opposite ends ofwhich are secured in suitable bearings on the upper frame members 5 ofthe end frames A, A of the machine, as shown, in pillow blocks 23secured to said frame members 5. The guide rods 22 are located above thetable C and the suporting arms 19 are of such length that, in use, theywill extend downwardly at a slight angle to the horizontal, say 15 de*grecs, so that the blocks 18 will bear upon the work B with a pressurecorresponding substantially to their own weight and the weight of thesupporting arms 19, both said blocks 18 and the arms 19 being preferablymade of metal, as cast iron. For most kinds of work, the surfaces of theblocks 18 which bear upon the work B, will be padded, my inventioncontemplating the use of any desired or approved form of pad, which neednot, therefore, be described in detail.

To provide for varying the pressure of the blocks 18 upon the work B,either by inn creasing or decreasing such pressure above or below thenormal pressure produced by the weight of said blocks and of theirsupporting arms 19, as may be desirable for doing different kinds ofwork, weights are preferably applied to said blocks in such manner thatthey may be adjusted to either increase or reduce the pressure of saidblocks and of their supporting arms due to their own weight. As shown,said weights are applied in the following manner :hSecured to the head21 are upright standaids 24 pivoted to which between their ends so as toextend on both sides thereof, are levers 25 which are connected to thearms 19 by rigid links 26 pivoted to the levers 25 and the arms 19 atpoints remote from their points of pivotal attachment to the standards24 and the head 21. The weights 27 are adapted to be "applied to eitherend of the levers 25 and to be secured in adjusted positions thereon bymeans of set screws or other suitable means. VVit-h the describedconstruction it is obvious that when said weights 27 are applied to thelevers 25 in front of their points of pivotal attachment to theirstandards 24, as shown in the drawings, they will operate to supplementthe weight of the blocks 18 and their supporting arms 19 and thusincrease the pressure of said blocks on the work, whereas, when appliedto the opposite ends of said levers, said weights will counteract inpart the weight of said blocks 18and their supporting arms 19 and thusreduce the pressure of said vblocks 18 on the work.

Reciprocating movement is adapted to be imparted to the head 21lengthwise of the guide rods 22, by means of suitable driving connectionwith a source of power, not shown, which will operate, in an obviousmanner, to impart a corresponding reciprocating movement to the blocks18 lengthwise of the table C and of the work B supported thereon.

As shown, the means for imparting reciprocating movement to the head 21is as follows At-tached to said head is a chain belt 28 which passesaround sprocket wheels 29 and 30 rotatably mounted at opposite ends ofthe machine frame, the sprocket wheel 30 being secured to rotate with ashaft 81 rotatably mounted in suitable bearings on the machine frame.The upper lap of said chain belt 28 is preferably supported'by an idlesprocket wheel 82 rotatably mounted at the upper end of rigid standards33 on the machine frame. Secured to rotate with the shaft 81 is a gear34 which meshes with a pinion 35 secured to a shaft 36 mounted insuitable xed bearings on the machine frame. Rotation in oppositedirections is adapted to be imparted to the shaft 86 and from it to theshaft 81 by means of belts, comprising an open belt 37 and a crossedbelt 38 adjusted to pulleys on said shaft 3G and on a shaft 39 rotatablymounted in bearings on the machine frame, said pulleys comprisingapulley 40 which is tight on the shaft 36 and pulleys 41 on each side ofsaid pulley 40 mounted to rotate freely on said shaft 86, and a. tightpulley on the shaft 89. The shaft 39 may be driven by means of directconnection with a source of power, but to provide for varying' the rateof travel of the head 21 and thus of the blocks 18, I prefer to drivesame directly from a shaft 42 rotatably mounted in suitable bearings onthe machine frame by means of a belt 48 adapted to be adjusted to conepulleys 44 and 45 secured to the shafts 39 and 42, respectively. On theshaft 42 are tight and loose pulleys 46 and 47 to which a ydriving beltconnecting the same with the source of power, as a line shaft, isadapted to be adjusted.

The machine is adapted to be reversed to cause the head 21 andthe blocks18 to travel in opposite directions, by suitable means consisting, asshown, of a lever 48 pivoted on the machine frame, which controls aslide rod 49, pins on which embrace opposite sides of the belts 87 and38 for shifting said belts from the tight to the loose pulleys and viceversa, as may be desired, in a familiar manner. As shown, said lever 48is a bell crank lever the free end thereof projecting toward the side ofthe machine on which the operator will stand, so that it may beconveniently grasped and operated by said operator.

In addition to the manual control of the machine by the lever 48, meansare also provided for automatically shifting the belts 87 and 38 toreverse the direction vof travel of the head 21 and blocks 18, when saidblocks 18 reach the limit of their travel in either direction. As shown,said means consist of a slide bar 50 mounted in suitable slide bearingson the machine frame, as shown, on the longitudinal frame member 1, soas to be movable in both directions. Secured in said slide rod or bar5() is a pin 51 which engages a slot 52 formed in the lever 48', wherebymovement of said Slide rod or bar 5() will impart pivotal movement -tosaid lever 48 to shift the belts 87 and 88. 'Secured to the slide bar50, preferably by means of set screws so that their positions on saidbar may be conveniently adjusted to vary the travel ofthe head 21 as maybe desired, are dogs 58 which project into the path of travel of rigidportions of the head 21 as the same moves in opposite directions. Withthe described construction it is obvious that the machine will beautomatically reversed whenever the head 21 engages either of the dogs53.

The operation of the machine is as follows Depending upon the kind ofwork to be done, a sheet of sand paper or of suitable soft material, asfelt, is secured to the under surfaces of the blocks 18; the workBplaced on the table C of the machine; and the dogs 58 on the slide bar50fadjusted so that the travel of the blocks 18 will correspond with thelength of the surface which it is desired to sand or rub. If desired,the work B may be secured to the surface of the table C, but this willnot ordinarily be necessary, as the weight of the work will ordinarilybe sufficient to hold it in position. The machine is then started,causing the blocks 18 to move back and forth over the surface of thework B and the table C is moved slowly back and forth by the operator sothat all parts thereof will be subjected to the action of said pads 1S,this being continued as long as necessary or desired.

There the work is to be rubbed or polished, oil and powdered pumice willbe applied to the surface of the work in the manner now common. Said oiland pumice may be applied directly to the pads on the blocks 18, whichare of absorbent material, or may be applied directly to the work in thefirst instance, being absorbed by the pads on said blocks until saidpads become saturated, after which it is only necessary to addsuflicient oil to prevent said pads from drying out.

A particular advantage of my improved machine is its adaptability forrubbing and finishing not only plain but curved surfaces, as curved pewbacks and the like. This advantage is due to the manner of supportingthe rubbing blocks 18, whereby they have a relatively wide range ofvertical movement as compared with any other machines for this purposeof which I have any knowledge, and exert a substantially uniformoperative pressure on the work in all positions.

I claim 1. In a machine of the type described, the combination of ahead, guides on which said head is movable lengthwise of the machine, ablock or blocks connected to said head so as to move therewith and to befreely movable toward and from the work independently of said head,through a relatively wide range of movement and with a practicallyuniform operating pressure and means for imparting reciprocatingmovement to said head together with said block or blocks, substantiallyas described.

2. In a machine of the type described, the combination of a head, guideson which said head is movable lengthwise of the machine, an arm or armspivoted to said head, a block or blocks pivoted to said arm or arms, andmeans for imparting reciprocating movement to said head, substantiallyas described.

3. In a machine of the type described, the combination of a head, guideson which said head is movable lengthwise of the machine, an arm or armspivoted to said head, a block or blocks pivoted to said arm or arms andmeans for varying the operative weight of said block or blocks, saidmeans comprising a lever or levers pivoted to said head, a link or linksconnecting said lever or levers to the arm or arms to which said blockor blocks are pivoted, and a weight or weights applied to said lever orlevers, substantially as described.

1. In a machine of the type described, the combination of a head, guideson which said head is movable lengthwise of the machine, an arm or armspivoted to said head, a block or blocks pivoted to said arm or arms andmeans for varying the operative weight of said block or blocks, saidmeans comprising a lever or levers pivoted between their ends upon saidhead, a link or links connecting said lever or levers with the arm orarms to which said block or blocks are pivoted, and a weight or weightsadapted to be applied to said lever or levers at opposite sides of theirpivotal points, substantially as described.

In testimony, that I claim the foregoing as my invention, I aiiiX mysignature in presence of two subscribing witnesses, this 9 day of July,A. D. 1909.

HENRY VESTPHAL.

lVitnesses:

R. II. MARKHAM, IRMA SCHULTZ.

